(not for commit) Create 2nd ContextProvider for Ganesh rasterization.

content/browser/compositor/surface_display_output_surface.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_COMPOSITOR_SURFACE_DISPLAY_OUTPUT_SURFACE_H_
 #define CONTENT_BROWSER_COMPOSITOR_SURFACE_DISPLAY_OUTPUT_SURFACE_H_
 
 #include "cc/output/output_surface.h"
 #include "cc/surfaces/surface_factory.h"
 #include "cc/surfaces/surface_factory_client.h"
@@ skipping 10 matching lines @@
 // This class is maps a compositor OutputSurface to the surface system's Display
 // concept, allowing a compositor client to submit frames for a native root
 // window or physical display.
 class SurfaceDisplayOutputSurface : public cc::OutputSurface,
                                     public cc::SurfaceFactoryClient {
  public:
   // The underlying cc::Display and cc::SurfaceManager must outlive this class.
   SurfaceDisplayOutputSurface(
       cc::SurfaceManager* surface_manager,
       cc::SurfaceIdAllocator* allocator,
-      const scoped_refptr<cc::ContextProvider>& context_provider);
+      const scoped_refptr<cc::ContextProvider>& context_provider,
+      const scoped_refptr<cc::ContextProvider>& worker_context_provider);
   ~SurfaceDisplayOutputSurface() override;
 
   void set_display_client(OnscreenDisplayClient* display_client) {
     display_client_ = display_client;
   }
   cc::SurfaceFactory* factory() { return &factory_; }
   void ReceivedVSyncParameters(base::TimeTicks timebase,
                                base::TimeDelta interval);
 
   // cc::OutputSurface implementation.
@@ skipping 13 matching lines @@
   gfx::Size display_size_;
   cc::SurfaceId surface_id_;
   cc::SurfaceIdAllocator* allocator_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfaceDisplayOutputSurface);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_SURFACE_DISPLAY_OUTPUT_SURFACE_H_